Set the Temperature in the centre of the display and then hold in the reset button until the display changes to C, this may take several seconds before the display changes. We all get fooled by this one.

Its always worth a quick search on the forum before you ask a question! if nothing else it can save you a couple of hours waiting for a reply, especially a trivial question, as it gets asked very often!

Note:The units of measure for outsideair temperature and the automatic climatecontrol can be toggled independent ofthe other displays. When showing theoutside air temperature, press and holdthe SET/RESET button for a short time.

This is clear and easy to understand information. Problem is people don't read manual, why should they, this is just a car, they know everything already And these are the results.